• July 25th 2009, 02:16 AM
alternative
If F is 400 N and S=2m^2, find the pressure(P) ? (Doh)(Speechless)
• July 25th 2009, 02:38 AM
songoku
P = F/A

In this case, A = S = area
• July 25th 2009, 03:00 AM
jashansinghal
what does S mean,displacement?
• July 25th 2009, 03:03 AM
songoku
From the unit given, it's area
• July 25th 2009, 03:07 AM
e^(i*pi)
Quote:

Originally Posted by jashansinghal
what does S mean,displacement?

S cannot be displacement because it has dimensions of (Length)^2 whereas displacement has dimensions of (Length). This means that S is an area of some kind although it is more usual to use A to denote an area

$P = \frac{F}{A}cos \alpha$ where $\alpha$ is the angle between the force and the vertical and will be measured in $Pa$ or $Nm^{-2}$

In your example it's probably a perpendicular force so $cos \alpha = 1$ and it reduces to $P=\frac{F}{A}$